Muhammad not Mad nor an Impostor
Believe thou not, O Messenger of Mine, when they say, "Thou art bereft of thy senses," when they charge thee with imposture. Thy Lord knoweth who are bereft of their senses, and who are the impostors. Warn thou those maligners of the awful judgment which awaits them. (68.)
God's Promise to Help Muhammad to Recite the Koran
We [Allah] shall enable thee to remember all the parts of the Koran, so that thou mayest recite them for the encouragement of those who believe and as a warning to all unbelievers. Nor shalt thou forget aught of this Revelation except what We please.[19] All those who fear God will receive the prophet's warning, but all those who disbelieve shall be cast into terrible fire where they will neither live nor die. This doctrine which We command thee to preach is that taught in the ancient Books, the Books of Abraham and of Moses, who were faithful Muslims. (87.)
The Koran Inspired
By the falling star, your comrade Muhammad does not err, nor does he speak his own mind. What he utters has been revealed to him. The Koran is from God through Gabriel; it is not the work of man. Why worship ye goddesses like Allat and Al'Uzza and Manah?There are no goddesses.[20] (53.)
The Treatment of Women Believers
When believing women come to you as fugitives, leaving behind them unbelieving husbands, send them not back to the infidels, but test their faith, and if they are found true Muslims, pay back to their husbands the dowries which they have expended. Then may ye marry them, provided ye give them the accustomed dowries. (60.)
God's Unity[21]
Say "He is but one God, the everlasting God who begets not,[22] nor is begotten, and there is none like unto Him." (10.)